As previously described in my former posting (http://lists.boost.org/boost-users/2006/10/22961.php) I am trying to instantiate a mpl::map with 150 types. Defining macros as stated in the documentation did not help. After taking a look in to the boost/mpl/map.hpp include file I assume that previously described error resides because compiler tries to include some pre-generated files: ----------------map.hpp excerpt----------------- #if !defined(BOOST_MPL_PREPROCESSING_MODE) # include <boost/mpl/limits/map.hpp> # include <boost/mpl/aux_/na.hpp> # include <boost/mpl/aux_/config/preprocessor.hpp> # include <boost/preprocessor/inc.hpp> # include <boost/preprocessor/cat.hpp> # include <boost/preprocessor/stringize.hpp> #if !defined(BOOST_NEEDS_TOKEN_PASTING_OP_FOR_TOKENS_JUXTAPOSING) # define AUX778076_MAP_HEADER \ BOOST_PP_CAT(map, BOOST_MPL_LIMIT_MAP_SIZE).hpp \ /**/ #else # define AUX778076_MAP_HEADER \ BOOST_PP_CAT(map, BOOST_MPL_LIMIT_MAP_SIZE)##.hpp \ /**/ #endif # include BOOST_PP_STRINGIZE(boost/mpl/map/AUX778076_MAP_HEADER) # undef AUX778076_MAP_HEADER #endif #include <boost/mpl/aux_/config/use_preprocessed.hpp> #if !defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) \ && !defined(BOOST_MPL_PREPROCESSING_MODE) # define BOOST_MPL_PREPROCESSED_HEADER map.hpp # include <boost/mpl/aux_/include_preprocessed.hpp> #else # include <boost/mpl/limits/map.hpp> # define AUX778076_SEQUENCE_NAME map # define AUX778076_SEQUENCE_LIMIT BOOST_MPL_LIMIT_MAP_SIZE # include <boost/mpl/aux_/sequence_wrapper.hpp> #endif // BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS #endif // BOOST_MPL_MAP_HPP_INCLUDED -------------end of map.hpp excerpt------------- As described in the documentation this file can not generate anything in a preprocessor mode until the macro BOOST_MPL_PREPROCESSING_MODE was defined. After the definition of this macro I got new errors. This errors were referring to some unknown types but the fact of preprossor execution was obvious at this time. The new errors are: c:\boost\include\boost-1_33_1\boost\mpl\aux_\sequence_wrapper.hpp(246) : error C2065: 'na' : undeclared identifier c:\boost\include\boost-1_33_1\boost\mpl\aux_\sequence_wrapper.hpp(254) : error C2913: explicit specialization; 'boost::mpl::map' is not a specialization of a class template c:\boost\include\boost-1_33_1\boost\mpl\aux_\sequence_wrapper.hpp(254) : error C2976: 'boost::mpl::map' : too few template arguments c:\boost\include\boost-1_33_1\boost\mpl\aux_\sequence_wrapper.hpp(254) : see declaration of 'boost::mpl::map' To be honest I do not know what would be the right solution, but the documentation insisted way does not work. Attached is my cpp file containing the defintions. I try to compile it using Visual C++ 2005 Express Edition. Should I run some generator scripts to create map60.hpp ... map150.hpp? Or is there any other solution? Would really appreciate any help! With Kind Regards, Ovanes Markarian